Improvement in carriage-jacks



UNITED STATES PATENT OEEICE.

GEO. L. OUMMINGS, OF NEW YORK, N. Y.

IMPROVEMENT IN CARRlAGE-JACKS.

Specification forming part of Letters Patent No. 49,090, dated August l, 1865,' antcdatcd July 26, 1865.

To all 'whom it 'may concern Be it known that I, GEO. L. CUMMrNGs, of the city, county, and State of New York, have invented a new and Improved Carriage-J ack 5 and I do hereby declare that thefollowing is a full, clear, and exact description ofthe same, reference being had to the accompanying dra-wings, forming part of this specilication7 in which- Figure lrepresen ts a sectional side elevation of my invention. Fig. 2 is a front elevation of the same.

Similar letters of reference in both views indicate corresponding parts.

This invention consists in the employment or use of an elbow-lever provided at the end of its short arm with a friction-roller, in combination with a slide moving vertically in suitable guides in such a manner that by turning the long arm of the elbow-lever down the friction-roller is caused to act on the-end of the slide, and the latter is forced up with little loss of power by friction, and when the long arin of the lever has arrived in a horizontal position the short arm retains the slide automatically wit-hout requiring` any fastening.

The invention consists, also, in the application ol' an adjustable rest in combination with a vertically-moving slide in such a manner that thejack can be readily set for carriages or wheels of dilferent height.

A represents a frame, made of wrought-iron or other suitable material, in form of a horseshoe, as clearly shown in Fig. 1 ot' the drawings, and provided with two tlanges,a, which serve to secure the same down to the platform or bed -plate B. By making the frame of wrought-iron I ain enabled to make the saine very light, and still preserve the necessary strength for all purposes to which it may be applied. Said frame is provided with two guides, o, which retain the slide O, and the lower end of this slide is spread so that the same is prevented from passing up through the guides and to drop out accidentally it the frame should be turned up or carelessly handled.

D is an elbow-lever, which has its fulcrum on a pivot, c, that is secured in the lower end of one shank ofthe frame A, and in a bracket, d, rising from one of the flanges a. The long arm of this elbow-lever forms the handle, and

its short arm is provided with a friction-roller, c, which bears in the lower end ofthe slide C. By this roller the friction between the end of the slide and the bearing-point of the lever is considerablyreduced, and the elbow-lever is so adjusted that when the handle is depressed to a horizontal position the short arm will be brought in a' vertical position or in line with the slide, and the latter is retained without requiring any fastening, and independent ofthe weight resting upon it.

One edge of the slide O is provided with teeth f, which serve to adjust the rest E. This rest is attached to the slide by means ofa strap, g, which is pivoted to said rest, and the inner edge of which catches over the teeth f, as clearly shown in Fig. l. By slightly raisingthe rest the strap is allowed to drop or to come in such a position that it clears the teeth and that the rest can be moved up or down, as may be desired. By these means thejack can be readily adjusted for axles or carriages of different height.

The rest E is provided with a lip, h, which is intended to bear on lthe under side of the axle to be raised, and with a shoulder, il, which bears on the side of the axle. In order to prevent thc paint on the side of theaxle from getting scratched or injured, I have protected the shoulder fi with a covering,j, ofindia-rubber or other soft and flexible material. This covering is secured to the shoulder by a rivet or in any other suitable manner, and by its use the jack can be readily applied to any axle without injuring the paint.

.Vhat I claim as new, and desire to secure by Letters Patent, is-

l. The combination of the frame A B, elbow- I lever D, friction-roller e, and sliding bar C, all constructed, arranged, and employed in the particular manner herein described, so that the short arm of the lever can be thrown into or beyond a vertical position, and thus sustain the weight without fastening the hand-lever. 2. The combination of the adjustable rest E and vertically-moving slide O,when constructed, and arranged to operate as herein specified.

GEO. L. OUMMINGS. Witnesses:

M. M. LIVINGSTON, GEO. W. REED. 

